EP0654812A1 - Tube à rayons X à anode tournante avec palier à glissement - Google Patents
Tube à rayons X à anode tournante avec palier à glissement Download PDFInfo
- Publication number
- EP0654812A1 EP0654812A1 EP94203318A EP94203318A EP0654812A1 EP 0654812 A1 EP0654812 A1 EP 0654812A1 EP 94203318 A EP94203318 A EP 94203318A EP 94203318 A EP94203318 A EP 94203318A EP 0654812 A1 EP0654812 A1 EP 0654812A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- lubricant
- lubricant channel
- bearing
- ray tube
- channel
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16N—LUBRICATING
- F16N27/00—Proportioning devices
- F16N27/005—Proportioning devices using restrictions
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/02—Parts of sliding-contact bearings
- F16C33/04—Brasses; Bushes; Linings
- F16C33/06—Sliding surface mainly made of metal
- F16C33/10—Construction relative to lubrication
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16N—LUBRICATING
- F16N7/00—Arrangements for supplying oil or unspecified lubricant from a stationary reservoir or the equivalent in or on the machine or member to be lubricated
- F16N7/12—Arrangements for supplying oil or unspecified lubricant from a stationary reservoir or the equivalent in or on the machine or member to be lubricated with feed by capillary action, e.g. by wicks
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J35/00—X-ray tubes
- H01J35/02—Details
- H01J35/04—Electrodes ; Mutual position thereof; Constructional adaptations therefor
- H01J35/08—Anodes; Anti cathodes
- H01J35/10—Rotary anodes; Arrangements for rotating anodes; Cooling rotary anodes
- H01J35/101—Arrangements for rotating anodes, e.g. supporting means, means for greasing, means for sealing the axle or means for shielding or protecting the driving
- H01J35/1017—Bearings for rotating anodes
- H01J35/104—Fluid bearings
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J2235/00—X-ray tubes
- H01J2235/10—Drive means for anode (target) substrate
- H01J2235/1046—Bearings and bearing contact surfaces
- H01J2235/106—Dynamic pressure bearings, e.g. helical groove type
Definitions
- the invention relates to a rotating anode X-ray tube with a plain bearing, in particular a spiral groove bearing for mounting the rotating anode, which comprises a fixed and a rotatable bearing part, a liquid lubricant being provided between the two bearing parts, and at least one of the two bearing parts having at least one lubricant channel Capillary action includes.
- Such a rotating anode X-ray tube is known from EP-A 378 273.
- the lubricant channels must have a capillary action so that the capillary forces do not allow the lubricant to flow into the vacuum space of the X-ray tube, even when the rotating anode is rotating.
- the capillary effect depends on the length and diameter of the lubricant channel. If a gallium alloy is used as the lubricant, the maximum capillary rise height is 45 mm with a diameter of the lubricant channel of 0.5 mm. With longer lubricant channels, the diameter of the channel must be even smaller. Bores with such a small diameter can only be realized with great effort at the specified length.
- the object of the present invention is to simplify the production of long lubricant channels in a rotating anode X-ray tube of the type mentioned at the beginning.
- This object is achieved in that the lubricant channel has a larger cross section than is permissible to achieve a capillary action and that in the lubricant is arranged a body wettable by the lubricant, which extends at least over part of the length of the lubricant channel and which has the free cross section in Lubricant channel reduced so far that there is a capillary effect.
- a hole is first made, the diameter of which is larger than permitted to achieve the capillary action; for example, the diameter of the bore in a lubricant channel with a length of 50 mm or more can be 1 mm.
- a bore is relatively easy to manufacture - for example by spark erosion - but shows no capillary action. This is achieved in that a body wettable by the lubricant is arranged in the lubricant channel formed by the bore, which reduces the free cross section in the lubricant channel to such an extent that a capillary effect results.
- a wire is arranged in the lubricant channel, the outer cross section of which is smaller than the inner cross section of the lubricant channel.
- a particularly simple fastening of the wire in the lubricant channel results from a further development of the invention in that the wire is shaped at one point - preferably at the end - in such a way that it clamps in the lubricant channel.
- Another development of the invention provides that an open-pore body is arranged in the lubricant channel.
- the entire cross-section of the channel can be filled through the body.
- the body is open-pore and porous, the capillary effect results from the porous structure of the body.
- the rotary anode X-ray tube shown in FIG. 1 has a metal piston 1, to which the cathode 3 is fastened relative to a first insulator 2 and the rotary anode is fastened via a second insulator 4.
- the rotating anode comprises an anode disk 5, on the surface of which is opposite the cathode and X-ray radiation is generated when a high voltage is switched on. This emerges through a radiation exit window 6, preferably made of beryllium, in the bulb.
- the anode disk 5 is connected via a slide bearing to a carrier body 7 which is fastened to the second insulator 4.
- the bearing comprises a rotationally symmetrical bearing part 8 which is fixedly connected to the carrier body 7 and which is enclosed by a rotatable bearing part 9 connected to the anode disk 5, the fixed bearing part being provided on its outer surface with a herringbone groove pattern 11 (spiral grooves).
- a herringbone groove pattern 11 is only on the outer surface of the fixed bearing part 8, but on - not visible in the drawing - on its end faces.
- Lubricant channels 12 are provided in the fixed bearing part, the purpose of which is explained in more detail in EP-A 378 273, to which express reference is made. Further lubricant channels, not shown in the drawing, can be provided, for example a lubricant channel which connects the area 18 in the middle between the halves of the spiral groove bearing 11 which serve to absorb the radial bearing forces and one of the end faces of the fixed bearing part.
- Fig. 2 shows such a lubricant channel in an enlarged view.
- the lubricant channel is formed by a bore 121 with a diameter of, for example, 1.1 mm in the fixed bearing part 8 and by a body arranged therein in the form of a wire 122 with an outer diameter of, for example, 1 mm.
- the space remaining between the wire 122 and the inner wall of the bore 121 has a capillary effect which corresponds to a bore with a diameter of 0.1 mm.
- the wire must be wettable by the lubricant.
- the wire and the inner surface of the bore can be made of the same material as the bearing parts 8 or 9; for a gallium alloy used as a lubricant
- a wire made of tungsten or molybdenum is suitable, the surface of which is preferably silver-plated in order to prevent oxidation and to achieve even better wettability.
- the wire 122 is flattened, i.e. deformed by squeezing so that it is clamped in the bore 121 and thus fixed. He can therefore not move in the axial direction in the bore, and come into contact with the bearing surface rotating relative to him. The capillary effect is retained.
- the lubricant channel in the bore 121 contains an open-pored body 122, the open pores of which are connected to one another and thus ensure a capillary action.
- Body 122 must be made of a material wettable by the lubricant, e.g. made of coarsely sintered molybdenum or tungsten.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Sliding-Contact Bearings (AREA)
- X-Ray Techniques (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE4339817 | 1993-11-23 | ||
DE4339817A DE4339817A1 (de) | 1993-11-23 | 1993-11-23 | Drehanoden-Röntgenröhre mit einem Gleitlager |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0654812A1 true EP0654812A1 (fr) | 1995-05-24 |
EP0654812B1 EP0654812B1 (fr) | 1997-02-26 |
Family
ID=6503181
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP94203318A Expired - Lifetime EP0654812B1 (fr) | 1993-11-23 | 1994-11-15 | Tube à rayons X à anode tournante avec palier à glissement |
Country Status (4)
Country | Link |
---|---|
US (1) | US5504797A (fr) |
EP (1) | EP0654812B1 (fr) |
JP (1) | JPH07192666A (fr) |
DE (2) | DE4339817A1 (fr) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19858369A1 (de) * | 1998-12-17 | 2000-07-06 | Siemens Ag | Drehanodenröhre mit fliegend gelagerter Drehanode, insbesondere für Computertomographieanlagen |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19502207A1 (de) * | 1995-01-25 | 1996-08-01 | Philips Patentverwaltung | Drehanoden-Röntgenröhre mit einem Gleitlager |
JP2001325908A (ja) | 2000-03-09 | 2001-11-22 | Toshiba Corp | 回転陽極型x線管 |
US9500226B2 (en) | 2014-08-13 | 2016-11-22 | General Electric Company | Method and systems for texturing liquid bearing surfaces in X-ray tubes |
DE102017208752A1 (de) | 2017-05-23 | 2018-11-29 | Zf Friedrichshafen Ag | Schmiermittelfördereinrichtung mittels Kapillarwirkung |
US11020067B1 (en) * | 2020-02-12 | 2021-06-01 | GE Precision Healthcare LLC | Hydrodynamic bearing system and method for manufacturing the hydrodynamic bearing system |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4096924A (en) * | 1975-07-11 | 1978-06-27 | Oil-Rite Corporation | Oiler assembly |
EP0378273A2 (fr) * | 1989-01-12 | 1990-07-18 | Philips Patentverwaltung GmbH | Tube à rayons X à anode tournante comportant un palier à glissement, en particulier un palier à rainures spirales |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4342375A (en) * | 1975-07-11 | 1982-08-03 | Oil-Rite Corporation | Porous rod metering valve |
US4396529A (en) * | 1978-11-13 | 1983-08-02 | Nordson Corporation | Method and apparatus for producing a foam from a viscous liquid |
DE3900730A1 (de) * | 1989-01-12 | 1990-07-19 | Philips Patentverwaltung | Drehanoden-roentgenroehre mit wenigstens zwei spiralrillenlagern |
CN1022007C (zh) * | 1990-10-05 | 1993-09-01 | 东芝株式会社 | 旋转阳极型x射线管 |
-
1993
- 1993-11-23 DE DE4339817A patent/DE4339817A1/de not_active Withdrawn
-
1994
- 1994-11-15 DE DE59401856T patent/DE59401856D1/de not_active Expired - Fee Related
- 1994-11-15 EP EP94203318A patent/EP0654812B1/fr not_active Expired - Lifetime
- 1994-11-17 US US08/344,207 patent/US5504797A/en not_active Expired - Fee Related
- 1994-11-21 JP JP6286353A patent/JPH07192666A/ja active Pending
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4096924A (en) * | 1975-07-11 | 1978-06-27 | Oil-Rite Corporation | Oiler assembly |
EP0378273A2 (fr) * | 1989-01-12 | 1990-07-18 | Philips Patentverwaltung GmbH | Tube à rayons X à anode tournante comportant un palier à glissement, en particulier un palier à rainures spirales |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19858369A1 (de) * | 1998-12-17 | 2000-07-06 | Siemens Ag | Drehanodenröhre mit fliegend gelagerter Drehanode, insbesondere für Computertomographieanlagen |
DE19858369C2 (de) * | 1998-12-17 | 2000-10-19 | Siemens Ag | Drehanodenröhre mit fliegend gelagerter Drehanode, insbesondere für Computertomographieanlagen |
Also Published As
Publication number | Publication date |
---|---|
DE4339817A1 (de) | 1995-05-24 |
DE59401856D1 (de) | 1997-04-03 |
JPH07192666A (ja) | 1995-07-28 |
EP0654812B1 (fr) | 1997-02-26 |
US5504797A (en) | 1996-04-02 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
EP0378274B1 (fr) | Tube à rayons X à anode tournante comprenant au moins deux paliers à rainures spirales | |
EP0430367B1 (fr) | Tube à rayons X | |
EP0578314B1 (fr) | Palier à contact lisse pour tube à rayons X à anode tournante | |
DE69124179T2 (de) | Drehanoden-Röntgenröhre | |
EP0378273B1 (fr) | Tube à rayons X à anode tournante comportant un palier à glissement, en particulier un palier à rainures spirales | |
DE69306454T2 (de) | Drehanoden-Röntgenröhre | |
EP0373705B1 (fr) | Tube à rayons X à anode tournante à lubrifiant liquide | |
DE69113382T3 (de) | Drehanoden-Röntgenröhre. | |
DE69118473T3 (de) | Drehanoden-Röntgenröhre | |
EP0654812B1 (fr) | Tube à rayons X à anode tournante avec palier à glissement | |
DE102004037511A1 (de) | Multipole durch Drahterosion | |
DE3221290A1 (de) | Elektrische lampe mit einem huelsenfoermigen sockel | |
DE69501615T2 (de) | Quecksilberlampe vom Kurzbogentyp | |
EP0724283A1 (fr) | Tube à rayons X à anode tournante avec palier à glissement | |
DE4419697A1 (de) | Drehanoden-Röntgenröhre | |
DE4444554C2 (de) | Gekapselte elektrische Hochspannungsleitung | |
DE19926741C2 (de) | Flüssigmetall-Gleitlager mit Kühllanze | |
DE19509006C2 (de) | Röntgenröhre | |
DE2304199B2 (de) | Verfahren zum Einbau der Einstellspindel eines Trimmpotentiometers | |
EP0361266A2 (fr) | Intensificateur d'images de rayons X | |
DE4434686A1 (de) | Röntgenröhre | |
DE3804516A1 (de) | Bildverstaerker | |
EP0110135B1 (fr) | Procédé pour la fabrication d'un tube à propagation d'ondes comportant une ligne à retard maintenue par des barreaux en matière diélectrique | |
DE10021716B4 (de) | Drehkolbenröhre | |
DE102015215308A1 (de) | Flüssigmetall-Gleitlager |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): DE FR GB NL |
|
17P | Request for examination filed |
Effective date: 19951124 |
|
GRAG | Despatch of communication of intention to grant |
Free format text: ORIGINAL CODE: EPIDOS AGRA |
|
17Q | First examination report despatched |
Effective date: 19960214 |
|
GRAH | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOS IGRA |
|
GRAH | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOS IGRA |
|
GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
|
AK | Designated contracting states |
Kind code of ref document: B1 Designated state(s): DE FR GB NL |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: NL Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 19970226 |
|
REF | Corresponds to: |
Ref document number: 59401856 Country of ref document: DE Date of ref document: 19970403 |
|
GBT | Gb: translation of ep patent filed (gb section 77(6)(a)/1977) |
Effective date: 19970429 |
|
ET | Fr: translation filed | ||
NLV1 | Nl: lapsed or annulled due to failure to fulfill the requirements of art. 29p and 29m of the patents act | ||
PLBE | No opposition filed within time limit |
Free format text: ORIGINAL CODE: 0009261 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT |
|
26N | No opposition filed | ||
REG | Reference to a national code |
Ref country code: FR Ref legal event code: CD |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: GB Payment date: 19991122 Year of fee payment: 6 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: FR Payment date: 19991123 Year of fee payment: 6 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: DE Payment date: 20000119 Year of fee payment: 6 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: GB Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20001115 |
|
GBPC | Gb: european patent ceased through non-payment of renewal fee |
Effective date: 20001115 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: FR Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20010731 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: DE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20010801 |
|
REG | Reference to a national code |
Ref country code: FR Ref legal event code: ST |